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Suppose you have 124 g of a mystery substance. It is made up of Hydrogen, oxygen and Carbon. It is burned in excess the oxygen. It produces 28.925 g of H2O and 161.527 g of CO2. The molar mass is 270 g/mol. Determine the molecular and the empirical formula? For combustion carried out in this experiment, determine the number of grams of O2 gas was needed to support the combustion of each gram of the mystery substance?

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